Is CVE-2019-17621 actively exploited?

Yes. CVE-2019-17621 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2019-17621 be exploited remotely?

The attack vector of CVE-2019-17621 has not been classified yet.

What is the CVSS score of CVE-2019-17621?

CVE-2019-17621 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2019-17621

HIGHCISA KEVIN THE WILD

CVE-2019-17621

Published: June 29, 2023

EPSS:93.01%probability of exploitation in 30 daysPercentile:99.8th

Official Description

D-Link DIR-859 router contains a command execution vulnerability in the UPnP endpoint URL, /gena.cgi. Exploitation allows an unauthenticated remote attacker to execute system commands as root by sending a specially crafted HTTP SUBSCRIBE request to the UPnP service when connecting to the local network.

NVD Source

CISA KEV Advisory

D-Link DIR-859 Router Command Execution Vulnerability

Added to KEV: 2023-06-29Federal patch deadline: 2023-07-20

Required Action (CISA)

Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.

Risk Analysis

This vulnerability in D-Link DIR-859 routers allows an unauthenticated attacker on the local network to execute commands as root by sending a crafted HTTP SUBSCRIBE request to the UPnP service. The high EPSS score of 0.93009 indicates a very high likelihood of exploitation, making this a critical concern for affected systems.

Active exploitation of this vulnerability has been observed in the wild, and it is included in CISA's KEV catalog, confirming its active use by threat actors. The vulnerability is remotely exploitable with low complexity.

Recommended Action

Users of D-Link DIR-859 routers should apply available patches or firmware updates immediately. Disabling the UPnP service if not strictly necessary can also reduce the attack surface.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2019-17621 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2019-17621 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.